2х-1/х при х=3;1;1/2;-1,6;100

x=3; 2*3-1/3=6-1/3=5 2/3=17/3x=1; 2*1-1/1=2-1=1x=1/2; 2*1/2-1/1/2=1-2=-1x=-1; 2*(-1)-1/(-1)=-2+1=-1x=6; 2*6-1/6=12-1/6=11 5/6=71/6x=100; 2*100-1/100=200-1/100=199 99/100=19999/100